void mongoc_bulk_operation_delete_one (mongoc_bulk_operation_t *bulk, const bson_t *selector);
This function queues a delete operation as part of bulk that will delete a single document matching selector. To delete a multiple documents, see mongoc_bulk_operation_delete().
This function is deprecated and should not be used in new code.
Please use mongoc_bulk_operation_remove_one() instead.
Errors are propagated via mongoc_bulk_operation_execute().